Laser sub

ABSTRACT

A laser beam sight incorporated inside a spear gun. The device has a capsule positioned at the tip of the spear gun, the capsule includes a light source preferably a laser diode and the battery powered, a magnetic switch in the handle (close to the spear gun trigger) to control the laser device, a cable to connect the capsule to the magnetic switch, and an optional floating bar located inside the spear gun barrel to balance the spear gun&#39;s weight in the water.

REFERENCES CITED - U.S. PATENT NOS.

[0001] D306,304

[0002] 3,656,845

[0003] 4,055,000

[0004] 4,894,940

[0005] 5,419,050

[0006] 5,495,675

[0007] 5,618,099

BACK GROUND OF THE INVENTION

[0008] The present invention concerns a laser beam incorporated inside aspear gun. The invention helps a spearfisherman correct the visualrefraction distortions inside the water.

[0009] When diving, one of the most difficult tasks for a spear gunfisherman is to aim accurately at the target due to the phenomenon ofrefraction distortions. This phenomenon is responsible for most missedshots. To take good aim, it is necessary that the hunter's line ofvision and the spear gun are on the same axis, and that this axis isperpendicular to the hunter's mask glass.

[0010] If the hunter's line of vision isn't perpendicular to the maskglass, in spite of the fact that the spear gun is aiming at the target,the shot will miss.

[0011] The laser sight corrects the refraction distortions by showingthe hunter the real position of the target without requiring thealignments explained above. This device improves the shot performance ofthe spear gun fisherman.

BRIEF SUMMARY OF THE INVENTION

[0012] The present invention was designed to be waterproof and towithstand the water pressure during diving. The device is made up of 1)a capsule that is unscrewed in half and contains a laser light sourceand batteries, 2) a magnetic switch to turn the laser source on or off,3) a cable that crosses the spear gun's barrel on the inside andconnects the capsule to the magnetic switch, and 4) a floating cylinderacross the barrel of the weapon, where the dimensions of the cylinderdepend on the dimensions of the barrel of the weapon. The dimensions ofthe capsule that contains the laser light source and batteries can varydepending on the model of the weapon. All these parts can be changed.The adaptations that must be done to the weapon to incorporate thedevice are: an hole at the shooting end of the weapon for the laser rayto exit, an opening in the weapon the near the trigger where themagnetic switch will be located, and the extraction of the tampons thatretain the air within the weapon's barrel in order to place the cablethat connects the magnetic switch to the laser capsule.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013]FIG. 1 Spear gun equipped with the laser device of the presentinvention

[0014] FIG.2 Is a longitudinal cross sectional view of a spear gun toillustrate the position of the laser device.

[0015]FIG. 3 Is a perspective view of the laser device of the presentinvention.

[0016]FIG. 4 Is an enlarged detail of the FIG. 2 to illustrate theposition of the laser device in the end of the spear gun barrel.

[0017]FIG. 5 Is an enlarged detail of the FIG. 2 to illustrate theposition of the laser device in the spear gun handle.

[0018]FIG. 6 Is a longitudinal cross sectional view of the extreme ofthe laser device, were there are the capsule that contain the laserlight source and the batteries.

[0019]FIG. 7 Is a transversal cross sectional view of the spear gun whoshow the position of the cable and the floating bar

[0020]FIG. 8 Is a longitudinal cross sectional view of the extreme ofthe laser device who insert into the switch that control the laserdevice.

[0021]FIG. 9 Is a longitudinal cross sectional view of the switch thatcontrols the laser device.

[0022]FIG. 10 Is an exploded perspective view of the laser device of thepresent invention.

DETAIL DESCRIPTION OF THE INVENTION

[0023]FIG. 1 is a frontal view of the weapon with the incorporatedlaser. Near the trigger of weapon 24, part of the switch that controlsthe laser, switch 1, can be seen. The end of weapon 25 has an openingwhere Laser ray A exits. Laser ray A is parallel to harpoon 26.

[0024]FIG. 2 is a cross section of the weapon that shows the positioningof floating material 21 inside the barrel of weapon 23. The elements ofthe laser in the front and back of the weapon are better shown in FIGS.4 and 5.

[0025]FIG. 3 is a perspective of the laser. Externally the device ismade up of glass 6 by where it shoots the laser ray, front half ofcapsule 2, back half of capsule 3, connection rubber 5 that connectscable 20 to the back part of capsule 3, an optional cylinder of floatingmaterial 21, the final part of cable 9 that connects to switch 7, andthe activator of switch 1.

[0026] FIGS. 4 - 5 are a detailed close up of FIG. 2, showing thepositioning of the laser in the weapon. In the front part of the weaponis the capsule of the laser; cable 20 crosses the barrel 23 of theweapon; in handle 22 there is an opening near the trigger of weapon 24to incorporate the switch 7 and its activator 1

[0027]FIG. 6 is a longitudinal section of the open capsule. It shows thepositioning of glass 6 in the front half of capsule 2, has part of itsinner surface in spiral for screw. The source of laser ray 10 ispositioned in the front part of capsule 2, a connector 19 connects thebatteries 8 to the source of laser ray 10. Another connector 18 connectssource of laser ray 10 with connector 17 in the back of capsule 3,another connector joins one of the two poles of cable 20 with battery 8.An isolating rubber 4 prevents water from entering capsule through theopening on its back 3, has part of its outer surface in spiral forscrew. Isolating connection rubber 16 allows cable 20 to go into thecapsule but prevents water infiltration through the back part of capsule3.

[0028]FIG. 7 is a cross section of the tube of weapon 23. This figureshows the positioning of the cylinder of floating material 21 and ofcable 20.

[0029]FIG. 8 is a longitudinal section of the part of the invention thatconnects to the switch in FIG. 9. Cable 20 is connected to a closed box9 which contains a fine sheet of stainless steel 13 that flexes when thedevice is connected and touches lower stainless steel 14, in effectclosing the electrical circuit and igniting the laser ray; a smallinsulating sheet 15 separates the two stainless steel sheets when thecircuit is disconnected.

[0030]FIG. 9 is a longitudinal section of the switch that controls thelaser. It includes box 7 that receives in its upper part the end of thecable in FIG. 8; a piece that activates switch 1, this piece broken inits central axis, a magnet 11 placed in a cavity within the activator ofswitch 1. A sheet of stainless steel 12 that maintains the device in theoff state, located in the lower inside part of the box of switch 7.

[0031]FIG. 10 is a zoomed perspective of the laser device, where thesize of cable 20 and floating material 21 depend on the size of theweapon's barrel, and the barrel's diameter

What I claim as my invention is:
 1. A light beam sight device locatedinside of a spear gun, the device comprising of: a) A magnetic switch toactivate the light beam mean. b) An elongate capsule containing thelight beam source and its power source. c) A cable that attaches thecapsule mean to the magnetic switch mean. d) A cylinder of floatingmaterial inside the tube of the spear gun
 2. The device of claim 1wherein the magnetic switch includes means for affixing the switch in‘on’ and ‘off’ position.
 3. The device of claim 2 wherein said magneticswitch means is adapted to turn on the light beam in pulse modeoperation.
 4. The device of claim 1 wherein said the power sourcementioned above is composed of a plurality of batteries.
 5. The deviceof claim 1 wherein said capsule mentioned above is made of reinforcedplastic.